Sources in the state election department confirmed on Tuesday that the commission has replaced nearly a dozen observers.
Aerial surveillance for Bihar polls
According to sources, the obervers replaced include two Indian Administrative Services oficers of the Maharashtra cadre. M M Adpani and B V Gopal Reddy have replaced S Paudwal and Sanjeev Kumar from the same cadre.
Other observes replaced were Satyajit Ranjan and B Thiruppugaj, Arnab Roy.
The Election Commission has appointed 243 observers for 243 assembly constituencies and 38 expenditure observers.